Remove Download.SavePageType UMA.

Bug: 642627
Change-Id: Ifbdf6871608937abd144d56704432fc433388e12
Reviewed-on: https://chromium-review.googlesource.com/1086091Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Ben Hayden <benjhayden@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564293}

chrome/browser/download/save_package_file_picker.cc

@@ -250,10 +250,6 @@ void SavePackageFilePicker::FileSelected(
     if (select_file_dialog_.get() &&
         select_file_dialog_->HasMultipleFileTypeChoices())
       download_prefs_->SetSaveFileType(save_type);
-
-    UMA_HISTOGRAM_ENUMERATION("Download.SavePageType",
-                              save_type,
-                              content::SAVE_PAGE_TYPE_MAX);
   } else {
     // Use "HTML Only" type as a dummy.
     save_type = content::SAVE_PAGE_TYPE_AS_ONLY_HTML;